The area from Sevierville, TN to the peak of the Smoky Mountains is a popular destination for summer road trips.

Much of the American Southeast is too hot in July for hiking. The nice thing about the Great Smoky Mountains National Park is that you can keep driving up in elevation until you get to 70 degrees F or less.
The problem with the Smoky Mountains is that too many people want to go. The economist Donald Shoup has written about The High Cost of Free Parking. Entry to the national park is still free, however as of 2023 parking is paid. Good for them. The fee is very cheap. You can print a pass before you go or easily buy one on the way in.
The parking pass didn’t deter many people when we went in 2023. I recommend going early if you want to be able to park near a trailhead, or if you want to avoid a line getting into the Clingman’s Dome parking lot.
Our family has a running joke about “the pancake cabin people”. As we drive into the mountains in the morning, we pass parking lots full of cars outside of restaurants called pancake cabins. As long as you are up early enough to beat the pancake cabin people, you should be able to park where you want to.
There are more attractions in the national park than you could see in one day. The most dramatic view is at the top of Clingman’s Dome. The most historic educational sites are at Cades Cove. The best swimming (that I know of) is in the creek at Chimneys picnic area.

There are dramatic lookouts that you can drive right up to. Cades Cove is mostly a driving experience with lots of optional stops (closed to cars on Wednesdays).
With little kids in tow, it’s hard to make progress on the hikes. The map says just 2 miles to a waterfall. Sounds great. We make it 0.3 miles in. Then someone demands to be carried. Someone trips and breaks down crying. Our snacks are gone. We turn around and return to the car… it’s all good as long as you get excited about leaves and bugs. If you are in the stroller stage of life, don’t expect to get far on any hikes.
If you get a hotel within an hour of the national park on the Tennessee side, there is a lot to do. I might call it “the Orlando of the mountains.” Dollywood is darling at Christmas time.
Years ago, I sent out a note from Chattanooga, a few hours away in Tennessee. That’s another cute green place with hiking and restaurant options, on a smaller scale than the Smoky’s area. Their aquarium is fantastic. It’s neat how their “River building” starts by showing how small streams in the Smoky Mountains feed into the Tennessee River.